Hello Bisma Thank you for sharing all these details—your symptoms and the tests you’ve had help paint a clear picture. Here’s a summary and what it means for you:
What’s Going On? - Heart palpitations and high heart rate: Your ECGs show sinus tachycardia (a fast but regular heart rhythm from the heart’s natural pacemaker), and your echo is normal. This means your heart structure is healthy. - Body aches, tingling, cold hands/feet, numbness, lump in throat, and breathing sensations: These symptoms are common in conditions like post-viral syndromes (especially after dengue), anxiety, or sometimes autonomic nervous system imbalance (like inappropriate sinus tachycardia or POTS). - Oxygen levels are normal: This is reassuring and means your lungs and heart are working well.
What Else Should Be Checked? Since your heart structure is normal and you’ve had dengue recently, the following tests can help rule out other causes: - Electrolytes (sodium, potassium, calcium, magnesium): Imbalances can affect heart rhythm and nerves. - Blood sugar (fasting and postprandial): To rule out diabetes or hypoglycemia. - ESR/CRP: To check for ongoing inflammation. - Holter monitoring (24–48 hours): If not already done, this can track your heart rhythm over a longer period.
Inappropriate sinus tachycardia (IST) is a condition where the heart rate is elevated without an obvious cause. To confirm this diagnosis and rule out other potential issues, several tests may be recommended: 1. Electrocardiogram (ECG): This test records the electrical activity of your heart and can help identify abnormal heart rhythms. 2. Holter Monitor: A portable ECG device worn for 24-48 hours to monitor your heart rate and rhythm during daily activities. 3. Echocardiogram: An ultrasound of the heart to assess its structure and function, ruling out any underlying heart conditions. 4. Exercise Stress Test: This test evaluates how your heart responds to physical stress and can help identify any exercise-induced arrhythmias. 5. Blood Tests: These may include thyroid function tests, electrolyte levels, and other markers to rule out metabolic or hormonal causes of tachycardia. 6. Tilt Table Test: This test assesses how your heart rate and blood pressure respond to changes in position, which can help identify autonomic dysfunction. 7. Electrophysiological Study (EPS): In some cases, a more invasive test may be performed to study the electrical pathways of the heart.
What Does This Mean? - Most likely, your symptoms are due to a combination of post-viral effects (common after dengue), possible anxiety, and maybe mild autonomic dysfunction. - The fact that your heart structure is normal is very reassuring. - These symptoms often improve with time, hydration, gentle exercise, and stress management.
What Should You Do Next? - Discuss the above tests with your doctor if not already done. - Focus on hydration, regular meals, gentle physical activity, and good sleep. - If symptoms worsen (fainting, chest pain, severe breathlessness), seek medical help immediately.
Thank you and get well soon
Hello dear See as per clinical history it seems post autonomic viral symptoms only. The reason behind is that the stimulation of autonomic nervous system even on doing mild physical work Iam suggesting some medication and precautions. Precautions you can follow for improvement but some medication have to be recommended by cardiologist only Change of posture Avoid long standing Do mild physical exercise Avoid over lifting start with smallest weight to increase endurance In addition you may be given Atenolol 25 mg Clonidine Midodrine Please get these medicines only after recommendation from cardiologist or concerned physician Please donot take any medication without consulting the concerned physician Hopefully you recover soon Regards
Hello
Bisma, Inappropriate Sinus Tachycardia (IST) is a diagnosis of exclusion. Based on what you’ve already done, most serious causes are already excluded.
Tests needed to CONFIRM IST & EXCLUDE others
If not done yet, these are enough:
24-hour Holter monitor Confirms high average HR (>90) and sinus rhythm only
Orthostatic vitals / Active standing test To rule out POTS (HR rise ≥30 bpm on standing)
Basic blood work (mostly already done): CBC ✔ TSH ✔ Electrolytes (Na, K, Mg) Vitamin B12 (low → needs treatment) Iron studies ✔
Inflammation follow-up Repeat CRP / ESR (post-viral inflammation common after dengue)
No need for CT scan, angiography, stress test, or EP study unless new red-flag symptoms appear.
What is MOST likely causing this
Post-viral autonomic dysfunction (after dengue) IST ± anxiety overlay Nutritional factors (low B12)
Is this dangerous?
No heart damage No rhythm disorder No circulation blockage Benign but uncomfortable
What to start now Hydration + adequate salt Gentle daily walking Vitamin B12 supplementation Avoid caffeine Beta-blocker only if cardiologist advises
When to worry
Only if: fainting, chest pain, persistent HR >160, or oxygen drop.
Your tests already support IST, and nothing serious is being missed. This condition improves over months, especially post-viral.
Thank you Take care Get well soon
Considering your symptoms and the timeline following your dengue fever, it’s reasonable to think of post-viral syndrome as a potential cause. Many viral infections, including dengue, can lead to prolonged symptoms that can include fatigue, palpitations, body aches, and autonomic disturbances like POTS (Postural Orthostatic Tachycardia Syndrome), though POTS would more typically be associated with a marked heart rate increase on standing. Your resting heart rates and ECGs suggest sinus tachycardia, but the normal echocardiogram is reassuring, indicating no structural heart disease.
Your lab tests show a few notable things: a mild elevation in CRP and ESR, which could indicate low-grade inflammation possibly from post-viral recovery. Your Vitamin B12 levels are a bit low, which could contribute to symptoms like tingling, and supplementing B12 might help alleviate some of these neurological symptoms. Ensuring adequate vitamin D and iron levels might also support your recovery.
In terms of next steps, it would be useful to investigate whether autonomic dysfunction like POTS could be contributing. A tilt table test might be useful if POTS is strongly suspected. Monitoring your symptoms in relation to posture changes or dehydration can help guide management. Ensuring you stay well-hydrated and considering electrolyte solutions could help if there’s a dysautonomic component. Engaging gradually in light, regular exercise can aid recovery from post-viral conditions as long as it doesn’t exacerbate symptoms.
Remember, anxiety could certainly exacerbate your condition—especially if you’re worried about your symptoms—but it’s likely a secondary issue rather than the root cause, given the post-viral context. Managing stress with meditation or therapy might still be beneficial. The sensation of throat tightness or breathing difficulty, despite normal oxygen levels, often responds well to slow, controlled breathing exercises.
It would be wise to follow-up with your healthcare provider regarding the low B12 levels and discuss whether trial supplementation is appropriate. Further cardiac or neurological evaluation might be warranted if symptoms persist or worsen significantly, to rule out other conditions. Stay cautious for any red-flag symptoms like severe chest pain or difficulty breathing that deviates from your usual pattern, which would warrant immediate attention.
Your symptoms and test results most strongly suggest post-viral autonomic dysfunction (IST/POTS-like) after dengue, compounded by low vitamin B12 and ongoing inflammation, rather than circulation blockage or heart disease (normal echo and sinus tachycardia support this). At this stage, focus on hydration with electrolytes, adequate salt intake, gentle daily activity, avoiding caffeine/decongestants, and starting vitamin B12 supplementation; anxiety can amplify symptoms but is likely secondary. Specialist consultation: continue follow-up with a cardiologist/physician (and consider neurology if tingling persists) for guided management and to decide if medications or further tests (orthostatic vitals, electrolytes) are needed.
Hello Bisma, thank you for sharing your concern. Based on your history and reports, this does not suggest heart disease. Your symptoms are most consistent with post-viral autonomic dysfunction (common after dengue).
What to do now- Hydration: 2.5–3 L water/day + adequate salt (unless restricted). Avoid triggers: caffeine, energy drinks, dehydration. Gradual conditioning: slow walking, then light exercises (avoid sudden exertion). Sleep & stress control: breathing exercises.
Supplements- -Tab. Methylcobalamin 1500mcg at night × 1 month. - Tablet Magnesium Glycinate (elemental Mg 200–250 mg) once daily at night × 4 weeks.
Kindly visit your nearest physician for other prescription medicines after a detailed and physical evaluation. Starting such medicines just like this via chat consultation might land you in complications.
Seek urgent care if you develop chest pain, fainting, breathlessness, or new neurological weakness.
Overall, this condition is benign and reversible, though recovery can take weeks to months after viral illness.
Feel free to reach out again.
Regards, Dr. Nirav Jain MBBS, D.Fam.Medicine
